<template>
    <el-container class="home-container">
        <!-- 头部区域 -->
        <el-header>
            <div>
                <img src="../assets/heima.png" alt="">
                <span>电商后台管理系统</span>
            </div>
            <el-button type="info" @click="logout">退出</el-button>
        </el-header>
        <!-- 页面主题区域 -->
        <el-container>
            <!-- 侧边栏 -->
            <el-aside :width="isCollapse ? '64px' : '200px'">
                <div class="toggle-button" @click="toggleCollapse">|||</div>
                <!-- 侧边栏菜单区 -->
                <el-menu
                    background-color="#333744"
                    text-color="#fff"
                    active-text-color="#409EFF"
                    :unique-opened="true"
                    :collapse="isCollapse"
                    :collapse-transition="false"
                    :router="true"
                    :default-active="activePath">
                    <!-- 一级菜单 -->
                    <el-submenu :index="item.id + ''" v-for="item in menulist" :key="item.id">
                        <!-- 一级菜单模板区 -->
                        <template slot="title">
                            <!-- 图标 -->
                            <i :class="iconsObj[item.id]"></i>
                            <!-- 文本 -->
                            <span>{{item.authName}}</span>
                        </template>
                        <!-- 二级菜单 -->
                        <el-menu-item 
                            :index="'/' + subItem.path" 
                            v-for="subItem in item.children" 
                            :key="subItem.id"
                            @click="saveNavState('/' + subItem.path)">
                            <template slot="title">
                                <!-- 图标 -->
                                <i class="el-icon-menu"></i>
                                <!-- 文本 -->
                                <span>{{subItem.authName}}</span>
                            </template>
                        </el-menu-item>
                    </el-submenu>
                </el-menu>
            </el-aside>
            <!-- 右侧内容 -->
            <el-main>
                <!-- 路由占位符 -->
                <router-view></router-view>
            </el-main>
        </el-container>
    </el-container> 
</template>

<script>
    export default {
        name: 'VueShopHome',
        created(){
            this.getMenuList(),
            this.activePath = window.sessionStorage.getItem('activePath')
        },
        data() {
            return {
                // 左侧菜单数据
                menulist:[],
                // 一级菜单图标
                iconsObj:{
                    '125': 'el-icon-user-solid',
                    '103': 'el-icon-s-grid',
                    '101': 'el-icon-s-goods',
                    '102': 'el-icon-s-claim',
                    '145': 'el-icon-s-marketing'
                },
                // 是否折叠
                isCollapse: false,
                // 被激活的链接地址
                activePath:''
            };
        },

        mounted() {
            
        },

        methods: {
            logout(){
                window.sessionStorage.clear();
                this.$router.push("/login")
            },
            // 获取所有的菜单
            async getMenuList(){
                const { data: res} = await this.$http.get('menus')
                if(res.meta.status !== 200) return this.$message.error(res.meta.msg)
                this.menulist = res.data
                console.log(res)
            },
            // 菜单折叠与展开
            toggleCollapse(){
                this.isCollapse = !this.isCollapse
            },
            // 保存链接激活状态
            saveNavState(activePath){
                window.sessionStorage.setItem('activePath', activePath)
                this.activePath = activePath
            }
        },
    };
</script>

<style lang="less" scoped>
.home-container{
    height: 100%;
}
.el-header{
    background-color: #373D41;
    display: flex;
    justify-content: space-between;
    padding-left: 0;
    align-items: center;
    color: #fff;
    font-size: 20px;
    > div{
        display: flex;
        align-items: center;
        span{
            margin-left: 15px;
        }
    }
}
.el-aside{
    background-color: #333744;
    .el-menu{
        border-right: none;
    }
}
.el-main{
    background-color: #eaedf1;
}
.iconfont{
    margin-right: 10px;
}
.toggle-button{
    background-color: #4A5064;
    font-size: 10px;
    line-height: 24px;
    color: #fff;
    text-align: center;
    letter-spacing: 0.2em;
    // 小手儿
    cursor: pointer;
}
</style>